Butt joint device suitable for pressure maintaining coring drilling tool and detection system

Abstract

The invention discloses a butt joint device suitable for a pressure-maintaining coring drilling tool and a detection system, and relates to the technical field of deep-sea sediment core sample test analysis, the butt joint device comprises a drilling tool storage cavity, a drilling tool rotating unit and a drilling tool clamping unit; the drilling tool storage cavity is used for hermetically storing a coring drilling tool; the drilling tool rotating unit can clamp an outer pipe of the coring drilling tool and can drive the outer pipe to rotate in the drilling tool storage cavity, and the outer pipe can move relative to the drilling tool rotating unit in the axial direction; a pressure retaining valve at one end of the coring drilling tool can extend into the drilling tool clamping unit, and the drilling tool clamping unit can clamp or loosen the pressure retaining valve; the drilling tool clamping unit can clamp the pressure retaining valve, and the drilling tool rotating unit can drive the outer pipe to rotate in the circumferential direction and move in the axial direction, so that the outer pipe is disconnected from the pressure retaining valve, and the detection system can transfer a rock core in the outer pipe through the drilling tool clamping unit. According to the butt joint device suitable for the pressure-maintaining coring drilling tool and the detection system, pressure-maintaining transferring of a rock core is conveniently achieved.

Description

Technical Field

[0001] The invention relates to the technical field of deep-sea sediment core sample testing and analysis, and in particular to a docking device suitable for a pressure-maintaining coring drill tool and a detection system. Background Art

[0002] The deep sea is the largest unknown area on Earth, containing all kinds of strategic resources and energy needed for the future development of human society. With the gradual reduction and even depletion of oil, gas and mineral resources on land and offshore, countries around the world have focused their future energy and resource development on the deep sea. To develop and utilize these resources, we must first understand the ocean - conduct marine geological surveys to understand basic information such as the types, distribution, mineralization conditions, and resource prospects of relevant resources, laying the necessary foundation for the exploration and development of marine resources; an important means of conducting marine geological surveys is to sample deep-sea sediments, and obtain information on seabed resources such as natural gas hydrates and organisms by conducting structural analysis, composition analysis, and age testing on the sediment samples obtained, as well as conducting research on relevant earth sciences.

[0003] The pressure-maintained sampling technology for seafloor sediments is relatively mature, but how to quickly transfer the cores to the detection system so as to perform multiple tests on the cores in a pressure-maintained and temperature-maintained environment is currently a major problem. In the current core transfer process, it is usually difficult to ensure the pressure-maintained transfer of the cores, which can easily cause inaccurate subsequent measurement results due to the pressure reduction of the cores. Summary of the invention

[0004] The purpose of the present invention is to provide a docking device suitable for a pressure-maintaining coring drill and a detection system to solve the problems existing in the above-mentioned prior art and facilitate the pressure-maintaining transfer of the core.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a docking device suitable for a pressure-maintaining coring drill tool and a detection system, comprising a drill tool storage chamber, a drill tool rotation unit and a drill tool clamping unit; the drill tool storage chamber is used for sealing and storing the coring drill tool; the drill tool rotation unit is sealed and connected to and communicated with one end of the drill tool storage chamber, the coring drill tool passes through the drill tool rotation unit, the drill tool rotation unit can be clamped on the outer tube of the coring drill tool and can drive the outer tube to rotate in the drill tool storage chamber, and the outer tube can move axially relative to the drill tool rotation unit; one end of the drill tool clamping unit is connected to the The drill tool rotation unit is sealed and connected at one side away from the drill tool storage chamber, and the other end is used to be sealed and connected with the detection system; the pressure-maintaining valve at one end of the coring drill tool can extend into the drill tool clamping unit, and the drill tool clamping unit can clamp or release the pressure-maintaining valve; the drill tool clamping unit can clamp the pressure-maintaining valve, and the drill tool rotation unit can drive the outer tube to rotate circumferentially and move axially, so that the outer tube is disconnected from the pressure-maintaining valve, so that the detection system can transfer the core in the outer tube through the drill tool clamping unit.

[0007] Preferably, the drill tool rotation unit comprises a shell and a drive assembly, one end of the shell is sealed and connected to the drill tool clamping unit and communicated, and the other end is sealed and connected to the drill tool storage chamber through a conversion cover; the drive assembly is arranged on the shell, the outer tube is passed through the shell, and the drive assembly can be transmission-connected to the outer tube; when the drill tool clamping unit clamps the pressure-maintaining valve, the drive assembly can drive the outer tube to rotate relative to the shell and the pressure-maintaining valve, and can drive the outer tube axially away from the pressure-maintaining valve to separate the outer tube from the pressure-maintaining valve.

[0008] Preferably, the drive assembly includes a worm, a worm wheel and a sleeve, the worm wheel is coaxially rotatably arranged in the housing, the worm is rotatably arranged on the housing, the sleeve is fixedly sleeved on the outer tube, the outer wall of the sleeve has a flat key extending in the axial direction, the worm wheel is sleeved outside the sleeve, and the flat key can be embedded in the inner wall of the worm wheel, and the worm is drivingly connected to the worm wheel; the worm can drive the worm wheel to rotate, so as to drive the outer tube to rotate circumferentially and move axially through the sleeve.

[0009] Preferably, the drilling tool rotation unit further comprises a counter arranged on the housing, and the counter is used to monitor the number of rotations of the worm.

[0010] Preferably, both ends of the worm are rotatably connected to pressure plates fixedly connected to the shell, and limiting sleeves are arranged on the inner sides of the two pressure plates. The worm passes through one end of the pressure plate and a limiting block is fixedly arranged thereon, and the worm passes through another end of the pressure plate and is sleeved with the counter; the worm wheel is rotatably connected to the bearing covers on both sides of the inside of the shell through bearings; a clamping sleeve is embedded between the sliding sleeve and the outer tube, and a locking cover capable of clamping the clamping sleeve is arranged on the sliding sleeve.

[0011] Preferably, the drill tool clamping unit includes a cabin and a clamping assembly, one end of the cabin is sealed and connected to the drill tool rotation unit and communicated, and the other end is sealed and connected to the detection system through an end cover; the clamping assembly is sealed and movably arranged on the cabin, and the clamping assembly can move radially along the cabin to clamp or release the pressure maintaining valve.

[0012] Preferably, the clamping assembly includes two clamping units symmetrically arranged on the cabin body, each of the clamping units includes a pressure rod movably passing through the cabin body, and one end of the pressure rod extending into the cabin body is provided with a clamping block capable of clamping the pressure-maintaining valve; the pressure rod can move radially along the cabin body so as to be clamped on the pressure-maintaining valve through the clamping block.

[0013] Preferably, the part of the pressure rod extending out of the cabin body is penetrated by a pressure cover, a guide threaded rod and a guide threaded cap, the pressure cover is fixedly connected to the cabin body, the guide threaded rod is fixedly connected to the pressure cover and movably connected to the pressure rod, the guide threaded cap is threadedly connected to the guide threaded rod, and the pressure rod and the guide threaded cap are relatively fixed; the guide threaded cap can rotate relative to the guide threaded rod to drive the pressure rod to reciprocate radially along the cabin body.

[0014] Preferably, an observation window is also sealed on the cabin.

[0015] Preferably, a sealing cap is detachably and hermetically connected to one end of the drilling tool sealing chamber away from the drilling tool rotating unit.

[0016] Compared with the prior art, the present invention has achieved the following technical effects:

[0017] The present invention provides a docking device suitable for a pressure-maintaining coring drill tool and a detection system. After the sampling work is completed, there is a core inside the coring drill tool and it is a high-pressure environment. The coring drill tool is placed in a drill tool storage chamber, and then the drill tool rotating unit is clamped on the outer tube of the coring drill tool. Then, the drill tool clamping unit is clamped on the pressure-maintaining valve of the coring drill tool. The drill tool clamping unit is sealed and connected to an external detection system, so that a sealed chamber is formed inside the drill tool storage chamber, the drill tool rotating unit and the drill tool clamping unit. The detection system is used to inject water and pressurize the inside until the internal pressure is balanced with the internal pressure of the drill tool. Then, under the premise that the drill tool clamping unit clamps the pressure-maintaining valve, the drill tool rotating unit drives the outer tube to rotate circumferentially and move axially, so that the outer tube is disconnected from the pressure-maintaining valve to expose the core inside the outer tube, so that the detection system can perform pressure-maintaining transfer on the core in the outer tube through the drill tool clamping unit, provide high-quality pressure-maintaining cores for subsequent core detection, and complete on-site pressure detection of deep-sea sediment core samples to avoid inaccurate measurement results due to pressure reduction of the core. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 is a front view of a docking device between a pressure-maintaining coring drill and a detection system provided in the first embodiment;

[0020] Figure 2 is a top view of the pressure-maintaining coring drill and the detection system docking device provided in the first embodiment;

[0021] Figure 3 is a cross-sectional view of a device for docking a pressure-maintaining coring drill tool and a detection system provided in the first embodiment;

[0022] Figure 4 It is a partial stereoscopic view of the drilling tool rotation unit provided in the first embodiment.

[0023] In the figure: 1-end cover; 2-drill tool clamping unit; 21-cabin; 22-guide thread cap; 23-pressure cap; 24-observation window; 25-guide thread rod; 26-pressure rod; 27-clamping block; 3-drill tool rotation unit; 31-housing; 32-limiting block; 33-pressure plate; 34-counter; 35-worm gear; 36-sliding sleeve; 37-locking cover; 38-expansion sleeve; 39-worm; 40-bearing cover; 41-flat key; 42-limiting sleeve; 4-adapter cover; 5-flange; 6-drill tool storage chamber; 7-thread cap; 8-outer tube; 9-pressure maintaining valve. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The purpose of the present invention is to provide a docking device suitable for a pressure-maintaining coring drill and a detection system to solve the problems existing in the above-mentioned prior art and facilitate the pressure-maintaining transfer of the core.

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Embodiment 1

[0028] This embodiment provides a docking device suitable for a pressure-maintaining coring drill and a detection system. Figure 1 , including a drill storage chamber 6, a drill rotation unit 4 and a drill clamping unit 2; the drill storage chamber 6 is used to seal and store the coring drill; the drill rotation unit 4 is sealed and connected to one end of the drill storage chamber 6, the coring drill passes through the drill rotation unit 4, the drill rotation unit 4 can be clamped on the outer tube 8 of the coring drill and can drive the outer tube 8 to rotate in the drill storage chamber 6, and the outer tube 8 can move axially relative to the drill rotation unit 4; one end of the drill clamping unit 2 is away from the drill rotation unit 4 One side of the drill tool storage chamber 6 is sealed and connected, and the other end is used to be sealed and connected with the detection system; the pressure-maintaining valve 9 at one end of the coring drill tool can extend into the drill tool clamping unit 2, and the drill tool clamping unit 2 can clamp or loosen the pressure-maintaining valve 9; the drill tool clamping unit 2 can clamp the pressure-maintaining valve 9, and the drill tool rotation unit 4 can drive the outer tube 8 to rotate circumferentially and move axially, so that the outer tube 8 is disconnected from the pressure-maintaining valve 9, so that the detection system can transfer the core in the outer tube 8 through the drill tool clamping unit 2.

[0029] After the sampling work is completed, there is a core inside the coring drill tool, and it is a high-pressure environment. The coring drill tool is placed in the drill tool storage chamber 6, which is used to store the drill tool and provide a high-pressure, low-temperature stable environment for the drill tool. Then the drill tool rotation unit 4 is clamped to the outer tube 8 of the coring drill tool, and then the drill tool clamping unit 2 is clamped to the pressure-retaining valve 9 of the coring drill tool. The drill tool clamping unit 2 is sealed and connected to the external detection system. The drill tool storage chamber 6, the drill tool rotation unit 4 and the drill tool clamping unit 2 are internally connected and connected to the detection system to form a sealed chamber. Through the detection system The whole interior is pressurized by water injection until the internal pressure is balanced with the internal pressure of the drill bit; then, under the premise that the drill bit clamping unit 2 clamps the pressure-maintaining valve 9, the drill bit rotating unit 4 drives the outer tube 8 to rotate circumferentially and move axially, so that the outer tube 8 is disconnected from the pressure-maintaining valve 9 to expose the core inside the outer tube 8, so that the detection system can transfer the core inside the outer tube 8 of the drill bit clamping unit 2 to maintain pressure, provide high-quality pressure-maintaining cores for subsequent core detection, and complete on-site pressure detection of deep-sea sediment core samples to avoid inaccurate measurement results due to pressure reduction of the core.

[0030] Among the optional solutions of this embodiment, it is more preferred to refer to Figure 2-Figure 4 The drill tool rotating unit 4 includes a shell 31 and a driving assembly. One end of the shell 31 is sealed and connected to the drill tool clamping unit 2, and the other end is sealed and connected to the drill tool storage chamber 6 through the adapter cover 4. The drill tool storage chamber 6 is sealed and connected to the adapter cover 4 through the flange 5. The driving assembly is arranged on the shell 31. An outer tube 8 is passed through the shell 31. The driving assembly can be connected to the outer tube 8 by transmission. When the drill tool clamping unit 2 clamps the pressure-maintaining valve 9, the driving assembly can drive the outer tube 8 to rotate relative to the shell 31 and the pressure-maintaining valve 9, and can drive the outer tube 8 axially away from the pressure-maintaining valve 9 to separate the outer tube 8 from the pressure-maintaining valve 9.

[0031] Further preferably, the drive assembly includes a worm 39, a worm wheel 35 and a sleeve 36, the worm wheel 35 is coaxially rotatably arranged in the housing 31, the worm 39 is rotatably arranged on the housing 31, the sleeve 36 is fixedly sleeved on the outer tube 8, the outer wall of the sleeve 36 has a flat key 41 extending axially, the worm wheel 35 is sleeved outside the sleeve 36, and the flat key 41 can be embedded in the inner wall of the worm wheel 35, and the worm 39 is connected to the worm wheel 35 in driving connection; the worm wheel 35 and the sleeve 36 are circumferentially driven and axially slidably matched through the flat key 41, so that the worm 39 can drive the worm wheel 35 to rotate and can drive the outer tube 8 to rotate circumferentially through the sleeve 36, and because the pressure-retaining valve 9 is clamped and cannot move, during the process of threaded rotation of the outer tube 8 and the pressure-retaining valve 9, there is always an axial force on the outer tube 8, so that the outer tube 8 moves axially and disengages from the pressure-retaining valve 9 to expose the core.

[0032] Further preferably, the drill tool rotation unit 4 also includes a counter 34 arranged on the shell 31, and the counter 34 is used to monitor the number of rotations of the worm 39; by monitoring the number of rotations of the worm 39 and then monitoring the movement distance of the drill tool outer tube 8 according to the thread sizes of the outer tube 8 and the pressure-retaining valve 9, it is possible to determine whether the outer tube 8 and the pressure-retaining valve 9 are detached when the inside is not visible; the counter 34 is sleeved outside the worm 39, and the counter 34 can adopt a conventional number of revolutions counter 34.

[0033] Further preferably, both ends of the worm 39 are rotatably connected to a pressure plate 33 fixedly connected to the housing 31, and a limiting sleeve 42 is provided on the inner side of the two pressure plates 33. The worm 39 passes through one end of the pressure plate 33 and is fixedly provided with a limiting block 32, and the worm 39 passes through the other end of the pressure plate 33 and is sleeved with a counter 34; the worm wheel 35 is rotatably connected to the bearing covers 40 on both sides of the inside of the housing 31 through a bearing; a tightening sleeve 38 is embedded between the sliding sleeve 36 and the outer tube 8, and a locking cover 37 capable of tightening the tightening sleeve 38 is provided on the sliding sleeve 36; specifically, a through hole is opened in the axial direction at the center of the pressure plate 33, there are two pressure plates 33, which are respectively fixed on two opposite surfaces of the housing 31 and can be sealed, the counter 34 is fixed on one of the pressure plates 33 to display the number of revolutions of the worm 39, and there are two bearing covers 40, which are respectively fixed on two sides of the inside of the housing 31 The worm wheel 35 is mounted on the bearing cover 40 through two bearings, the expansion sleeve 38 is mounted in the sliding sleeve 36, and the locking cover 37 is connected to the sliding sleeve 36 through a thread to play the role of compressing the expansion sleeve 38. The limiting sleeve 42 is set as a copper sleeve, and there are two of them, which are fixedly mounted on both ends of the worm 39 to play a limiting role. The worm 39 cooperates with the worm wheel 35, and both ends extend out of the housing 31 and the pressure plate 33 and can be rotatably connected, and ensure that the limiting sleeve 42 is inside the housing 31. The limiting block 32 is installed at one end of the worm wheel 35 through a cotter pin to play a limiting role to prevent the worm 39 from being out of cooperation; the worm 39 is rotated by an external drive such as a motor drive to drive the worm wheel 35 to rotate, and under the action of the flat key 41, the sliding sleeve 36 will also rotate together. Due to the existence of the flat key 41, the sliding sleeve 36 is subjected to axial force, and the sliding sleeve 36 can rotate circumferentially while driving the outer tube 8 to move axially.

[0034] Among the optional solutions of this embodiment, it is more preferred to refer to Figure 2 The drill tool clamping unit 2 includes a cabin 21 and a clamping assembly. One end of the cabin 21 is sealed and connected to the drill tool rotating unit 4, and the other end is sealed and connected to the detection system through the end cover 1; the clamping assembly is sealed and movably arranged on the cabin 21, and the clamping assembly can move radially along the cabin 21 to clamp or release the pressure-maintaining valve 9; the inner diameter of the cabin 21 should be larger than the outer diameter of the pressure-maintaining valve 9. After the pressure-maintaining valve 9 is separated from the outer tube 8, the clamping assembly releases the pressure-maintaining valve 9, so that the pressure-maintaining valve 9 falls into the cabin 21 to avoid affecting the detection system's grasping of the core.

[0035] Further preferably, the clamping assembly includes two clamping units symmetrically arranged on the cabin body 21, each clamping unit includes a pressure rod 26 movably passing through the cabin body 21, and one end of the pressure rod 26 extending into the cabin body 21 is provided with a clamping block 27 capable of clamping the pressure-maintaining valve 9; the pressure rod 26 can move radially along the cabin body 21 so as to be clamped on the pressure-maintaining valve 9 through the clamping block 27; through the two symmetrically arranged clamping units, the pressure-maintaining valve 9 can be stably clamped so that the clamping block 27 on the pressure rod 26 cooperates to clamp on the pressure-maintaining valve 9.

[0036] Further preferably, the part of the pressure rod 26 extending out of the cabin body 21 is penetrated by a pressure cover 23, a guide threaded rod 25 and a guide threaded cap 722, the pressure cover 23 is fixedly connected to the cabin body 21 such as being bolted, the guide threaded rod 25 is fixedly connected to the pressure cover 23 and is movably connected to the pressure rod 26, the guide threaded cap 722 is threadedly connected to the guide threaded rod 25, and the pressure rod 26 and the guide threaded cap 722 are relatively fixed; the guide threaded cap 722 can rotate relative to the guide threaded rod 25 to drive the pressure rod 26 to reciprocate radially along the cabin body 21; specifically, a boss that can abut against the guide threaded cap 722 is provided on the pressure rod 26 to achieve relative fixation, and the pressure rod 26 does not rotate with it, or the pressure rod 26 is directly fixedly connected to the guide threaded cap 722 and rotates synchronously with the guide threaded cap 722 to achieve movement.

[0037] Further preferably, an observation window 24 is sealed on the cabin body 21 , through which the internal situation can be observed.

[0038] Further preferably, one end of the drilling tool sealing chamber away from the drilling tool rotating unit 4 is detachably and hermetically connected with a blocking cap, and the blocking cap seals the drilling tool sealing chamber.

[0039] Specifically, the movable penetration of the docking device of the pressure-maintaining coring drill provided in this embodiment and the detection system can be sealed by a sealing ring, and the sealed connection can be detachably connected by bolts to facilitate installation and disassembly.

[0040] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A docking device suitable for a pressure-maintaining coring drill and a detection system, characterized in that: include: A drilling tool storage chamber, used for sealing and storing coring drilling tools; a drill tool rotating unit, which is sealed and connected to one end of the drill tool storage chamber and communicates with the core drilling tool, the core drilling tool passes through the drill tool rotating unit, the drill tool rotating unit can be clamped on the outer tube of the core drilling tool and can drive the outer tube to rotate in the drill tool storage chamber, and the outer tube can move axially relative to the drill tool rotating unit; and A drill tool clamping unit, one end of which is sealed and connected to a side of the drill tool rotating unit away from the drill tool storage chamber, and the other end of which is sealed and connected to a detection system; the pressure-maintaining valve at one end of the coring drill tool can extend into the drill tool clamping unit, and the drill tool clamping unit can clamp or release the pressure-maintaining valve; The drill clamping unit can clamp the pressure-maintaining valve, and the drill rotating unit can drive the outer tube to rotate circumferentially and move axially, so that the outer tube is disconnected from the pressure-maintaining valve, so that the detection system can pass through the drill clamping unit and transfer the core in the outer tube.

2. The docking device for a pressure-maintaining coring drill and a detection system according to claim 1, characterized in that: The drill tool rotation unit includes a shell and a drive assembly, one end of the shell is sealed and connected to the drill tool clamping unit and communicated, and the other end is sealed and connected to the drill tool storage chamber through a conversion cover; the drive assembly is arranged on the shell, the outer tube is passed through the shell, and the drive assembly can be transmission-connected to the outer tube; when the drill tool clamping unit clamps the pressure-maintaining valve, the drive assembly can drive the outer tube to rotate relative to the shell and the pressure-maintaining valve, and can drive the outer tube axially away from the pressure-maintaining valve to separate the outer tube from the pressure-maintaining valve.

3. The docking device for a pressure-maintaining coring drill and a detection system according to claim 2, characterized in that: The driving assembly includes a worm, a worm wheel and a sleeve. The worm wheel is coaxially rotatably arranged in the housing, the worm is rotatably arranged on the housing, the sleeve is fixedly sleeved on the outer tube, the outer wall of the sleeve has a flat key extending in the axial direction, the worm wheel is sleeved outside the sleeve, and the flat key can be embedded in the inner wall of the worm wheel, and the worm is drivingly connected to the worm wheel; the worm can drive the worm wheel to rotate, so as to drive the outer tube to rotate circumferentially and move axially through the sleeve.

4. The docking device for a pressure-maintaining coring drill and a detection system according to claim 3, characterized in that: The drilling tool rotating unit further comprises a counter arranged on the housing, and the counter is used to monitor the number of rotations of the worm.

5. The docking device for pressure-maintaining coring drilling tools and detection systems according to claim 4, characterized in that: Both ends of the worm are rotatably connected to pressure plates fixedly connected to the shell, and limiting sleeves are arranged on the inner sides of the two pressure plates. The worm passes through one end of the pressure plate and a limiting block is fixedly arranged thereon, and the worm passes through another end of the pressure plate and a sleeve is arranged thereon with the counter; the worm wheel is rotatably connected to the bearing covers on both sides of the shell through bearings; a tightening sleeve is embedded between the sliding sleeve and the outer tube, and a locking cover capable of tightening the tightening sleeve is arranged on the sliding sleeve.

6. The docking device for a pressure-maintaining coring drill and a detection system according to claim 1, characterized in that: The drill tool clamping unit includes a cabin and a clamping assembly, one end of the cabin is sealed and connected to the drill tool rotation unit, and the other end is sealed and connected to the detection system through an end cover; the clamping assembly is sealed and movably arranged on the cabin, and the clamping assembly can move radially along the cabin to clamp or release the pressure maintaining valve.

7. The docking device for a pressure-maintaining coring drill and a detection system according to claim 6, characterized in that: The clamping assembly includes two clamping units symmetrically arranged on the cabin body, each of the clamping units includes a pressure rod movably passing through the cabin body, and one end of the pressure rod extending into the cabin body is provided with a clamping block capable of clamping the pressure-maintaining valve; the pressure rod can move radially along the cabin body so as to be clamped on the pressure-maintaining valve through the clamping block.

8. The docking device for a pressure-maintaining coring drill and a detection system according to claim 7, characterized in that: The part of the pressure rod extending out of the cabin body is penetrated by a pressure cover, a guide threaded rod and a guide threaded cap, the pressure cover is fixedly connected to the cabin body, the guide threaded rod is fixedly connected to the pressure cover and movably connected to the pressure rod, the guide threaded cap is threadedly connected to the guide threaded rod, and the pressure rod and the guide threaded cap are relatively fixed; the guide threaded cap can rotate relative to the guide threaded rod to drive the pressure rod to reciprocate radially along the cabin body.

9. The docking device for a pressure-maintaining coring drill and a detection system according to claim 7, characterized in that: An observation window is also sealed on the cabin body.

10. The docking device for a pressure-maintaining coring drill and a detection system according to claim 1, characterized in that: One end of the drilling tool sealing cabin away from the drilling tool rotating unit is detachably and hermetically connected with a blocking cap.

Images